Added by Erhan Aydın over 8 years ago
Since we updated our witty version to 3.3.4, our uploads using WFileUpload are extremely slow regardless of network set up or platform.
Frequently, uploads are interrupted and session is hung.
When we traced the situation with Wireshark, we saw "TCP ZeroWindow" lines which indicates the client buffer is full. We thought this could be because frequent progressbar updates and disabled the progressbar (by not giving its instance to setProgressBar method). Result is the same. When we downgrade witty to version 3.3.3 everything is fine again. Any ideas about it?